What are you feeding them? I never once had bloat with my africans. I fed them NLS cichlid formula. I'm not a fanboy, and don't normally recommend exclusively feeding NLS... but for africans, it proved very successful for me. High protein causes bloat... seems to me that I remember hearing that their intestines were much longer than most fish to pull nutrients out of the algae and plant matter that they eat in the wild, which is why high protein bloats them.